Alternatively, if you are running WeatherCat V3.0.0, you can wait for the update notification within WeatherCat. If you can't wait, you can hit the 'Check For Update...' menu item in the WeatherCat menu.

As mentioned elsewhere, I upgraded to High Sierra (macOS 10.13.6) this past Monday. I have been pleased to see that High Sierra seems to manage memory a bit better than it predecessor. Amazingly, WeatherCat itself is using quite a bit less memory than before. Here is a graph with the before and after:

As you can see, over the previous weekend WeatherCat memory growth was quite rapid. Monday afternoon into Tuesday I restarted WeatherCat a few times until I finally resolved the problem with my WC AppleScript Tags Processor script. WeatherCat has been running now for almost 3 days and it is no where close to the 750 MB of RAM it was using over the weekend.

So those of you lagging behind as I was, perhaps it is indeed worth the trouble of upgrading to High Sierra after all.

Good to see you moved up to High Sierra, Edouard. Does that mean Stu gave the general OK to run WC on High Sierra or did you just decide it was probably time since several forum members reported the WC work-around sufficed?

I leave for an out-of-the-country trip in a few hours so I'm going to miss the early adopter switchover to Mojave. I haven't had any problems with WC on Mojave for the past several builds but we've seen this is somewhat dependent on the hardware configuration. Good luck to everyone trying WC on Mojave on their particular machine. Suggest having a (verified) bootable clone before you start down that rabbit hole if you're running WC on your main computer.

I'm not sure version 3.0.2 was ever announced formally, but I've been running it successfully on a "new", stock Mac mini running macOS 10.13 High Sierra for several months. I think the only 'announcement' was in reference to the creation of a PDF file on this thread: Monthly pdf corrupted in WeatherCat 3.0 Post #12

WeatherCat 3.0.2 is a beta build that is still under development. It addresses a few issues that do not trouble all WeatherCat users, including a work-around for those of us whose hardware exhibits a macOS High Sierra bug that causes WeatherCat (and at least one other app) to freeze whilst the lock screen (requiring a password to login to the computer after the display has gone to sleep) is engaged. This bug only manifests itself on certain hardware and is not widespread.

Thanks, Blick, that topic didn't show up in my search. I vaguely remember it, however. I think I installed it when I saw the option in the topic I listed. At any rate, it shows how responsive Stu is to reported problems and is skill at working around OS bugs.